Incubator



FIG. 1 is a front, top and right perspective view of an incubator, showing our new design;

FIG. 2 is a front, top and left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side devotional view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an incubator, as shown and described. 